Dynamic lighting?

Hi, we are trying to make a dynamic day and night cycle. We don't have problem with the sky but we can't change the sun light in real time without relight (is too low ingame).

We are trying use the .ml files to change the light but don't find any function. We dont' know if it is possible without modify the engine or is too hard. We don't know if TGE can do it, but it is true we are interest in this.

Anybody knows if we can do it?


Thanks, and sorry about my english.